The 2 and 3-way joints can be done conveniently with dowels. The 5 way joints a biscuit or twowould come in handy. You could do it all withpocket screws and plug the holes if the frameis to be painted.

If you’re looking for a challenge many of thejoints can be half-lapped. Butt joints are easierto cut but half-laps are quite strong when glued-up.